1 The body produces too much cortisol hormone by itself (known as âendogenousâ Cushingâs syndrome).  A person takes large amounts of steroid medication to treat conditions such as asthma, rheumatoid arthritis or eczema. This is known as âexogenousâ Cushingâs syndrome.
Deficiency. A shortage or insufficiency. The amount by which federal Income Tax due exceeds the amount reported by the taxpayer on his or her return; also, the amount owed by a taxpayer who has not filed a return.
Definitions of Vitamin A deficiency: Condition due to a deficiency of vitamin A. - (Source-Diseases Database). Vitamin A deficiency is listed as a  rare disease  by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).This means that Vitamin A deficiency, or a subtype of Vitamin A deficiency, affects less than 200,000 people in the US population.efinitions of Vitamin A deficiency: Condition due to a deficiency of vitamin A. - (Source-Diseases Database). Vitamin A deficiency is listed as a  rare disease  by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).